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Spectacles are the most common lens treatment to correct myopia. This arm is set to be as a control group for the other two arms. Myopia patients who enter in this group will wear a normal pair of glasses after the baseline examinations (axial length, refraction...).

Other: Spectacles

Normal spectacle lenses were used to correct myopia as the control group.

Active Comparator: Myovison

Myovision is a kind of specially designed, commercially available spectacle lenses that could control the peripheral refraction of myopia patients. Latest studies have changed the understanding of myopia--correcting both central and peripheral vision during lens treatment is indicating to be an effective way of slowing down eye growth. Patients who entered this group will wear a pair of Myovision after baseline examinations.

Other: Myovision

Myovision is a kind of specially designed spectacle glasses that could control the peripheral refraction of myopia patients. It is commercially available.

Active Comparator: Ortho-K

Orthokeratology has recently been reported as an effective way to control eye growth for myopia adolescents. Patents who enter this group will wear ortho-K lenses during sleep after baseline examinations.

Spherical Equivalent Refraction (SER), which usually changes from time to time, will be measured 3 times by an open field auto-refractometer. The first SER examination was considered as the baseline data, and will be repeated 6 and 12 months later.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.